My gearstick is a bit far when engaging 3rd or 5th in my truck: I made this offset knob so I can reach those gears without leaning forward.

Made for a ‘98 Ford Ranger but should fit other vehicles with a 5/8" or about 15.6mm shaft. Printed in PETG with supports, painted it and used a bit of glue; it’s going strong for over a year.